Rovaniemi Airport lies inside the Arctic Circle at 66.56° N, 25.83° E, on Europe/Helsinki time (UTC+3). At this latitude winter brings long nights, de-icing and snow clearance, and the great-circle routes that pass overhead run closer to the pole than a flat map suggests.
Rovaniemi Airport has 1 runway. The longest, 03/21, measures 9,849 ft by 197 ft, which puts the field in the widebody capable category: twin-aisle aircraft can use it, and narrowbodies have length to spare. The surface is asphalt. It is lit for night operations.
Runway 03/21 is aligned roughly north-east/south-west, which is the clearest hint you get about the prevailing wind here: runways are built to face the wind that blows most often, because aircraft take off and land into it. Every runway here shares that north-east/south-west alignment, so a strong crosswind means a crosswind landing rather than a switch to another strip.